@article{PMFA_1981_26_4_a3,
     author = {Pontrjagin, L. S.},
     title = {O matematice a kvalit\v{e} jej{\'\i} v\'yuky},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {203--215},
     year = {1981},
     volume = {26},
     number = {4},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/PMFA_1981_26_4_a3/}
}